And, as nurbs surfaces can be different in vertice count, open/closed, you may need some planning or to redo the stuff you have done for EASY attatchment of the nurbs surfaces.
I tried to attatch a nurbs cylinger with a 180 nurbs sphere as the cap, but I could not get it to work. So I copied the cylinder and used the outer hulls, by scaling them down to close the end. And finally I made the vertices of the last hull to join at the same point, by using the move tool, with vertice-snapping.
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